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DTC U1004: Lost Communication with Engine Gateway Module [09/2015 - ]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Refer to PRECAUTION [09/2015 - ] ).

    Result:  NEXT

    NEXT 

    See step  2

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

    Result:  NEXT

    NEXT 

    See step  3

  3. CHECK CAN BUS WIRE (CAN MAIN WIRE FOR DISCONNECTION, BUS LINE FOR SHORT CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY663698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Resistance: Malfunction
      S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 54 to 69 Ω Below 53 Ω: Short in line
      S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 54 to 69 Ω Higher than 70 Ω: Open in CAN main bus line
      S48-9 (CA2H) - S48-2 (BECU) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short
      S48-1 (CA2L) - S48-2 (BECU) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short
      S48-9 (CA2H) - S46-3 (GND1) Engine switch off 200 Ω or higher Below 200 Ω: Ground short
      S48-1 (CA2L) - S46-3 (GND1) Engine switch off 200 Ω or higher Below 200 Ω: Ground short
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Parking Brake ECU Assembly)
      RESULT

      Result Proceed to
      NG
      • Open in CAN main wire
      		 A
      NG
      • Short in line
      • +B short
      • Ground short
      		 B
      OK C

    Result:  B

    B 

    See step  16

    Result:  C

    C 

    See step  49

    Result:  A

    A 

    See step  4

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 4 JUNCTION CONNECTOR - PARKING BRAKE ECU ASSEMBLY) 
    1. Disconnect the No. 4 junction connector.
      GTY634813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S58-10 (CANH) - S58-21 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 4 Junction Connector)

    Result:  NG

    NG 

    See step  6

    Result:  OK

    OK 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 4 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY676280Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S58-11 (CANH) - S58-22 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 4 Junction Connector)

    Result:  OK

    OK 

    REPLACE NO. 4 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  8

  6. CONNECT CONNECTOR 
    1. Reconnect the S58 No. 4 junction connector.

    Result:  NEXT

    NEXT 

    See step  7

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (PARKING BRAKE ECU ASSEMBLY - NO. 4 JUNCTION CONNECTOR) 
    1. Disconnect the parking brake ECU assembly connector.
      GTY616780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Parking Brake ECU Assembly)

    Result:  OK

    OK 

    REPLACE PARKING BRAKE ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO PARKING BRAKE ECU ASSEMBLY (PARKING BRAKE ECU ASSEMBLY - NO. 4 JUNCTION CONNECTOR) 

  8. CONNECT CONNECTOR 
    1. Reconnect the S58 No. 4 junction connector.

    Result:  NEXT

    NEXT 

    See step  9

  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY) 
    1. Disconnect the No. 6 junction connector.
      GTY681206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-8 (CANH) - A65-19 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 6 Junction Connector)

    Result:  NG

    NG 

    See step  11

    Result:  OK

    OK 

    See step  10

  10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY622023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-7 (CANH) - A65-18 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 6 Junction Connector)

    Result:  OK

    OK 

    REPLACE NO. 6 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) 

  11. CONNECT CONNECTOR 
    1. Reconnect the A65 No. 6 junction connector.

    Result:  NEXT

    NEXT 

    See step  12

  12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY) 
    1. Disconnect the No. 7 junction connector.
      GTY614336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A66-1 (CANH) - A66-12 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 7 Junction Connector)

    Result:  NG

    NG 

    See step  14

    Result:  OK

    OK 

    See step  13

  13. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY673569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A66-4 (CANH) - A66-15 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 7 Junction Connector)

    Result:  OK

    OK 

    REPLACE NO. 7 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR) 

  14. CONNECT CONNECTOR 
    1. Reconnect the A66 No. 7 junction connector.

    Result:  NEXT

    NEXT 

    See step  15

  15. CHECK FOR OPEN IN CAN BUS MAIN WIRE (POWER STEERING ECU ASSEMBLY - NO. 7 JUNCTION CONNECTOR) 
    1. Disconnect the power steering ECU assembly connector.
      GTY646993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A44-1 (CA2H) - A44-8 (CA2L) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Power Steering ECU Assembly)

    Result:  OK

    OK 

    REPLACE POWER STEERING ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (POWER STEERING ECU ASSEMBLY - NO. 7 JUNCTION CONNECTOR) 

  16. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR SIDE) 
    1. Disconnect the A66 No. 7 junction connector.
      GTY663698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω
      S48-9 (CA2H) - S46-3 (GND1) Engine switch off 200 Ω or higher
      S48-1 (CA2L) - S46-3 (GND1) Engine switch off 200 Ω or higher
      S48-9 (CA2H) - S48-2 (BECU) Engine switch off 6 kΩ or higher
      S48-1 (CA2L) - S48-2 (BECU) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Parking Brake ECU Assembly)

    Result:  NG

    NG 

    See step  29

    Result:  OK

    OK 

    See step  17

  17. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - STEERING CONTROL ECU) 
    NOTE:

    For vehicles without a variable gear ratio steering system, go to "Check for Short in CAN Bus Wires (No. 7 Junction Connector - Suspension Control ECU)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY629241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A66-2 (CANH) - A66-13 (CANL) Engine switch off 200 Ω or higher
      A66-2 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-13 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-2 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A66-13 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 7 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  21

    Result:  OK

    OK 

    See step  18

  18. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - SUSPENSION CONTROL ECU) 
    NOTE:

    For vehicles without an air suspension system, go to "Check for Short in CAN Bus Wires (No. 7 Junction Connector - Clearance Warning ECU Assembly)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY632321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A66-3 (CANH) - A66-14 (CANL) Engine switch off 200 Ω or higher
      A66-3 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-14 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-3 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A66-14 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 7 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  23

    Result:  OK

    OK 

    See step  19

  19. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - CLEARANCE WARNING ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY653836Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A66-5 (CANH) - A66-16 (CANL) Engine switch off 200 Ω or higher
      A66-5 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-16 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-5 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A66-16 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 7 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  25

    Result:  OK

    OK 

    See step  20

  20. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY626369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A66-1 (CANH) - A66-12 (CANL) Engine switch off 108 to 132 Ω
      A66-1 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-12 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A66-1 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A66-12 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 7 Junction Connector)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 7 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  27

  21. CONNECT CONNECTOR 
    1. Reconnect the A66 No. 7 junction connector.

    Result:  NEXT

    NEXT 

    See step  22

  22. CHECK FOR SHORT IN CAN BUS WIRES (STEERING CONTROL ECU) 
    1. Disconnect the steering control ECU connector.
      GTY654777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A42-4 (CAN+) - A42-9 (CAN-) Engine switch off 54 to 69 Ω
      A42-4 (CAN+) - L31-4 (CG) Engine switch off 200 Ω or higher
      A42-9 (CAN-) - L31-4 (CG) Engine switch off 200 Ω or higher
      A42-4 (CAN+) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A42-9 (CAN-) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Steering Control ECU)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE STEERING CONTROL ECU 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING CONTROL ECU (CAN+, CAN-) 

  23. CONNECT CONNECTOR 
    1. Reconnect the A66 No. 7 junction connector.

    Result:  NEXT

    NEXT 

    See step  24

  24. CHECK FOR SHORT IN CAN BUS WIRES (SUSPENSION CONTROL ECU) 
    1. Disconnect the suspension control ECU connector.
      GTY631749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R1-22 (CA2H) - R1-21 (CA2L) Engine switch off 54 to 69 Ω
      R1-22 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      R1-21 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      R1-22 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R1-21 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Suspension Control ECU)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE SUSPENSION CONTROL ECU 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SUSPENSION CONTROL ECU (CA2H, CA2L) 

  25. CONNECT CONNECTOR 
    1. Reconnect the A66 No. 7 junction connector.

    Result:  NEXT

    NEXT 

    See step  26

  26. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Disconnect the clearance warning ECU assembly connector.
      GTY628693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L19-3 (CA2H) - L19-5 (CA2L) Engine switch off 54 to 69 Ω
      L19-3 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      L19-5 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      L19-3 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      L19-5 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CLEARANCE WARNING ECU ASSEMBLY (CA2H, CA2L) 

  27. CONNECT CONNECTOR 
    1. Reconnect the A66 No. 7 junction connector.

    Result:  NEXT

    NEXT 

    See step  28

  28. CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU ASSEMBLY) 
    1. Disconnect the power steering ECU assembly connector.
      GTY646595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A44-1 (CA2H) - A44-8 (CA2L) Engine switch off 108 to 132 Ω
      A44-1 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A44-8 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A44-1 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A44-8 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Power Steering ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE POWER STEERING ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CA2H, CA2L) 

  29. CONNECT CONNECTOR 
    1. Reconnect the A66 No. 7 junction connector.

    Result:  NEXT

    NEXT 

    See step  30

  30. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR) 
    1. Disconnect the No. 6 junction connector.
      GTY617795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-8 (CANH) - A65-19 (CANL) Engine switch off 108 to 132 Ω
      A65-8 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-19 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-8 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A65-19 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 6 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR) 

    Result:  OK

    OK 

    See step  31

  31. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR SIDE) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY663698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω
      S48-9 (CA2H) - S46-3 (GND1) Engine switch off 200 Ω or higher
      S48-1 (CA2L) - S46-3 (GND1) Engine switch off 200 Ω or higher
      S48-9 (CA2H) - S48-2 (BECU) Engine switch off 6 kΩ or higher
      S48-1 (CA2L) - S48-2 (BECU) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Parking Brake ECU Assembly)

    Result:  NG

    NG 

    See step  41

    Result:  OK

    OK 

    See step  32

  32. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - DRIVING SUPPORT ECU ASSEMBLY) 
    NOTE:

    For vehicles without a pre-collision system, go to "Check for Short in CAN Bus Wires (No. 6 Junction Connector - Skid Control ECU Assembly)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY640386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-11 (CANH) - A65-22 (CANL) Engine switch off 200 Ω or higher
      A65-11 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-22 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-11 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A65-22 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 6 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  35

    Result:  OK

    OK 

    See step  33

  33. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - SKID CONTROL ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY628425Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-9 (CANH) - A65-20 (CANL) Engine switch off 200 Ω or higher
      A65-9 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-20 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-9 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A65-20 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 6 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  37

    Result:  OK

    OK 

    See step  34

  34. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY649888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A65-10 (CANH) - A65-21 (CANL) Engine switch off 200 Ω or higher
      A65-10 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-21 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A65-10 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A65-21 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 6 Junction Connector)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 6 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  39

  35. CONNECT CONNECTOR 
    1. Reconnect the A65 No. 6 junction connector.

    Result:  NEXT

    NEXT 

    See step  36

  36. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT ECU ASSEMBLY) 
    1. Disconnect the driving support ECU assembly connector.
      GTY649501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A33-16 (CA2H) - A33-17 (CA2L) Engine switch off 54 to 69 Ω
      A33-16 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A33-17 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A33-16 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A33-17 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Driving Support ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE DRIVING SUPPORT ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT ECU ASSEMBLY (CA2H, CA2L) 

  37. CONNECT CONNECTOR 
    1. Reconnect the A65 No. 6 junction connector.

    Result:  NEXT

    NEXT 

    See step  38

  38. CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU ASSEMBLY) 
    1. Disconnect the skid control ECU assembly connector.
      GTY617794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A19-7 (CA2H) - A19-6 (CA2L) Engine switch off 54 to 69 Ω
      A19-7 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A19-6 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A19-7 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A19-6 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Skid Control ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE SKID CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU ASSEMBLY (CA2H, CA2L) 

  39. CONNECT CONNECTOR 
    1. Reconnect the A65 No. 6 junction connector.

    Result:  NEXT

    NEXT 

    See step  40

  40. CHECK FOR SHORT IN CAN BUS WIRES (ECM) 
    1. Disconnect the ECM connector.
      GTY640806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A13-18 (CA2H) - A13-17 (CA2L) Engine switch off 54 to 69 Ω
      A13-18 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-17 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-18 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A13-17 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to ECM)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO ECM (CA2H, CA2L) 

  41. CONNECT CONNECTOR 
    1. Reconnect the A65 No. 6 junction connector.

    Result:  NEXT

    NEXT 

    See step  42

  42. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR) 
    1. Disconnect the No. 4 junction connector.
      GTY679737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S58-11 (CANH) - S58-22 (CANL) Engine switch off 108 to 132 Ω
      S58-11 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-22 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-11 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      S58-22 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 4 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR) 

    Result:  OK

    OK 

    See step  43

  43. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH) 
    NOTE:

    For vehicles without a blind spot monitor system, go to "Check for Short in CAN Bus Wires (No. 4 Junction Connector - Parking Brake ECU Assembly)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY668716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S58-8 (CANH) - S58-19 (CANL) Engine switch off 200 Ω or higher
      S58-8 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-19 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-8 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      S58-19 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 4 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  45

    Result:  OK

    OK 

    See step  44

  44. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - PARKING BRAKE ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY682815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S58-10 (CANH) - S58-21 (CANL) Engine switch off 108 to 132 Ω
      S58-10 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-21 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-10 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      S58-21 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 4 Junction Connector)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 4 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  47

  45. CONNECT CONNECTOR 
    1. Reconnect the S58 No. 4 junction connector.

    Result:  NEXT

    NEXT 

    See step  46

  46. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Disconnect the blind spot monitor sensor LH connector.
      GTY685407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      n1-2 (CA1P) - n1-7 (CA1N) Engine switch off 54 to 69 Ω
      n1-2 (CA1P) - L31-4 (CG) Engine switch off 200 Ω or higher
      n1-7 (CA1N) - L31-4 (CG) Engine switch off 200 Ω or higher
      n1-2 (CA1P) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      n1-7 (CA1N) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BLIND SPOT MONITOR SENSOR LH (CA1P, CA1N) 

  47. CONNECT CONNECTOR 
    1. Reconnect the S58 No. 4 junction connector.

    Result:  NEXT

    NEXT 

    See step  48

  48. CHECK FOR SHORT IN CAN BUS WIRES (PARKING BRAKE ECU ASSEMBLY) 
    1. Disconnect the parking brake ECU assembly connector.
      GTY675515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω
      S48-9 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher
      S48-1 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher
      S48-9 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      S48-1 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Parking Brake ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE PARKING BRAKE ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO PARKING BRAKE ECU ASSEMBLY (CA2H, CA2L) 

  49. CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY641849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to ECM)      		 - -
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

    2. Disconnect the ECM connectors.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A14-7 (BATT) - Body ground Always 11 to 14 V
      A14-8 (IGSW) - Body ground Engine switch on (IG) 11 to 14 V
      A13-1 (+B2) - Body ground Engine switch on (IG) 11 to 14 V
      A13-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A14-1 (EC) - Body ground Always Below 1 Ω
      E2-5 (ME01) - Body ground Always Below 1 Ω
      E3-1 (E1) - Body ground Always Below 1 Ω
      E2-2 (E01) - Body ground Always Below 1 Ω
      E2-1 (E02) - Body ground Always Below 1 Ω
      E3-4 (E04) - Body ground Always Below 1 Ω

    Result:  OK

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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